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authorAtish Patra <atish.patra@wdc.com>2019-02-22 11:41:39 -0800
committerPalmer Dabbelt <palmer@sifive.com>2019-03-04 10:40:39 -0800
commit291debb38dbbce9d5e7c342c5d6dc616f1d9777e (patch)
tree7850ccf161b2297e325d93a5807f9543caadda64 /arch/riscv
parentRISC-V: Allow hartid-to-cpuid function to fail. (diff)
downloadlinux-dev-291debb38dbbce9d5e7c342c5d6dc616f1d9777e.tar.xz
linux-dev-291debb38dbbce9d5e7c342c5d6dc616f1d9777e.zip
RISC-V: Compare cpuid with NR_CPUS before mapping.
We should never have a cpuid greater that NR_CPUS. Compare with NR_CPUS before creating the mapping between logical and physical CPU ids. This is also mandatory as NR_CPUS check is removed from riscv_of_processor_hartid. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv')
-rw-r--r--arch/riscv/kernel/smpboot.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/riscv/kernel/smpboot.c b/arch/riscv/kernel/smpboot.c
index d369b669fe04..eb533b5c2c8c 100644
--- a/arch/riscv/kernel/smpboot.c
+++ b/arch/riscv/kernel/smpboot.c
@@ -66,6 +66,11 @@ void __init setup_smp(void)
found_boot_cpu = 1;
continue;
}
+ if (cpuid >= NR_CPUS) {
+ pr_warn("Invalid cpuid [%d] for hartid [%d]\n",
+ cpuid, hart);
+ break;
+ }
cpuid_to_hartid_map(cpuid) = hart;
set_cpu_possible(cpuid, true);